To solve for this, we need to remember some things.
Hundreds = 100.00
Tens = 10.00
Ones = 1.00
There is a difference between these and Hundredths, Tenths, and Thousandths.
Hundredths = 0.01
Tenths = 0.10
Thousandths = 0.001
Let's plug in our numbers.
We have 7 hundreds
7(100.00)
We have 0 tens
0(0.00)
We have 100 ones
100(1.00)
7(100.00) = 700.00
0(0.00) = 0.00
100(1.00) = 100.00
700.00 + 100.00 + 0.00 = 800.00
Your number is 800.00
I hope this helps!